Howcast - Learn how to do an arm triangle choke from modified mount MMA submission from Team Radical MMA head coach Rene Dreifuss in this Howcast video.

Howcast - Learn how to do an arm bar from guard MMA submission using high guard from Team Radical MMA head coach Rene Dreifuss in this Howcast video.

Howcast - Learn how to do an arm bar from mount MMA submission from Team Radical MMA head coach Rene Dreifuss in this Howcast video.

Howcast - Learn how to do an inverted arm lock / hiza gatame from guard MMA submission from Team Radical MMA head coach Rene Dreifuss in this Howcast video.

Howcast - Learn how to do a belly down arm lock MMA submission from Team Radical MMA head coach Rene Dreifuss in this Howcast video.

Howcast - Learn how to do a Jacaré-style kimura from guard MMA submission from Team Radical MMA head coach Rene Dreifuss in this Howcast video.

Howcast - Learn how to do a flying scissor heel hook from Team Radical MMA head coach Rene Dreifuss in this Howcast video.

Howcast - Learn how to do a rolling arm bar from guard MMA submission from Team Radical MMA head coach Rene Dreifuss in this Howcast video.

Howcast - Learn how to do a Brabo from scarf hold from Team Radical MMA head coach Rene Dreifuss in this Howcast video.

Howcast - Learn how to do a no-arm Brabo or D'Arce choke MMA submission from Team Radical MMA head coach Rene Dreifuss in this Howcast video.

Howcast - Learn how to do a Brabo choke, also known as the D'Arce Choke, from Team Radical MMA head coach Rene Dreifuss in this Howcast video.

Howcast - Learn how to do a twister lock MMA submission from Team Radical MMA head coach Rene Dreifuss in this Howcast video.

Howcast - Learn how to do a rolling arm bar from back mount MMA submission from Team Radical MMA head coach Rene Dreifuss in this Howcast video.

Howcast - Learn how to do an arm triangle choke from the top half guard position from Team Radical MMA head coach Rene Dreifuss in this Howcast video.

Howcast - Learn how to do a triangle choke from guard using head control MMA submission from Team Radical MMA head coach Rene Dreifuss in this Howcast video.

Howcast - Learn the rat guard & rubber guard basics from Team Radical MMA head coach Rene Dreifuss in this Howcast MMA video.

Howcast - Learn how to do De La Riva guard attacks from Team Radical MMA head coach Rene Dreifuss in this Howcast MMA video.

Howcast - Learn how to do butterfly guard attacks from Team Radical MMA head coach Rene Dreifuss in this Howcast MMA video.

Howcast - Learn passing and striking from half guard top from Team Radical MMA head coach Rene Dreifuss in this Howcast MMA video.

Howcast - Learn how to do the rolling arm bar from Team Radical MMA head coach Rene Dreifuss in this Howcast MMA video.

Howcast - Learn how to do the arm bar from Team Radical MMA head coach Rene Dreifuss in this Howcast MMA video.

In England, a desert antelope has been transferred to the Bedfordshire zoo in an ongoing effort to bring the species back from the brink of extinction. Having traveled from the Aalborg Zoo in Denmark through land and sea, Sabre, a...

Can people with bipolar disorder take stimulants to treat ADHD? This video addresses this common question, including how stimulants can affect mood stability and the careful management required to balance treatment for both conditions.

Check out two new verb tenses: The Present Progressive and Immediate Future. This is part 1 in the series: 'Advanced Spanish: Verb Tenses'.